Tobey Maguire -- Peter Parker, "Spider-Man"

Merrick Morton / Columbia Pictures

Height: 5'9" Weight: Unknown. But the actor had to bulk up significantly to play Spider-Man after having slimmed down to just 137 pounds to play jockey Red Pollard in "Seabiscuit." Heroic secret: To go from high school nerd to muscle-bound hero, Maguire underwent six months of six-day-a-week training, which included martial arts, weight lifting, gymnastics and, yes, massage. Spider-Man is one of the more sensitive superheroes.

Height: 5'9" Weight: Unknown. But the actor had to bulk up significantly to play Spider-Man after having slimmed down to just 137 pounds to play jockey Red Pollard in "Seabiscuit." Heroic secret: To go from high school nerd to muscle-bound hero, Maguire underwent six months of six-day-a-week training, which included martial arts, weight lifting, gymnastics and, yes, massage. Spider-Man is one of the more sensitive superheroes. (Merrick Morton / Columbia Pictures)

Height: 5'9" Weight: Unknown. But the actor had to bulk up significantly to play Spider-Man after having slimmed down to just 137 pounds to play jockey Red Pollard in "Seabiscuit." Heroic secret: To go from high school nerd to muscle-bound hero, Maguire underwent six months of six-day-a-week training, which included martial arts, weight lifting, gymnastics and, yes, massage. Spider-Man is one of the more sensitive superheroes.